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[Discuss-gnuradio] QT GUI FFTSINK in C++ Flowgraph

From: Daniel Labarowski
Subject: [Discuss-gnuradio] QT GUI FFTSINK in C++ Flowgraph
Date: Sat, 15 Dec 2012 02:07:02 -0500
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0

I am attempting to use qt gui widgets in a C++ flowgraph. I managed to get all of the build dependencies figured out, which was no easy task in itself and required a lot of direct includes. Anyway, the error that I am getting now deals directly with the make function. The line that is giving me trouble is as follows

qtgui_sink_c_sptr qtsink = qtgui_make_sink_c (fftsize, gr_firdes::WIN_HAMMING, 0, 1.0, "Spectrum Display", true, true, true, true, QWidget *parent=NULL);

Information on this function is available here. The error that I am getting is that parent is undefined. I really don’t know what to put for this. Note that I have also tried putting just NULL or just 0 and it throws an undefined reference error (for the function call). I was wondering if someone could give me some pointers on what to use for parent? While I would eventually like to have both an fft and a time domain view in a single window, I am currently just trying to get the fft to show in its own window. Thanks ahead of time!


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